ICs for Audio Common Use AN7077Z Power supply and boost IC for class-H power amplifier ■ Overview 4.00±0.20 1.50±0.10 18.00±0.30 13.50±0.30 2.40±0.50 1 15 1.27 +0.20 0.50−0.10 13.25±0.30 15.65±0.50 18.95±0.50 10.0±0.30 φ3.60±0.10 ■ Features • Incorporating various protection circuits • Built-in standby circuit • Peak detection circuit : Limits class-H operation at high frequency • Built-in timer circuit If a current larger than allowable value continues to flow into the power supply transformer, this circuit stops the class-H operation to prevent the transformer from damage by a fire. • Built-in mute function • Built-in LED driver 3.25±0.10 Unit : mm A BTL 50 W × 2-channel (maximum. 75 W × 2channel) class-H power amplifier can be made up by combining the power supply boost amplifier AN7077Z and the single power supply BTL audio power amplifier AN7194Z, and it is possible to make a low consumption power system. (0.61) (1.80) (2.54) R0.55 (1.95) +0.15 0.25−0.05 19.00±0.30 19.30±0.30 HZIP015-P-0745A ■ Applications • Miniature audio component, CD player radio cassette, karaoke and other audio equipment 1 AN7077Z ICs for Audio Common Use 14 ■ Block Diagram 12 LED driver 1 ASO 6 Peek det. Level shift 4 VBE 8 Level shift 1 VBE 15 10 kΩ VIN IOUT det. 9 Mute 11 15 µA 24 V clamp Class-H mute 4 VRF = 6 V 2 13 5 µA 5 7 Constant current GND 10 0.3 V 6V STB VRF ■ Pin Descriptions Pin No. 2 Description Pin No. Description 1 Power supply 9 NF 2 N.C. 10 Standby 3 Timer current setting 11 Muting 4 Current detection 12 LED 5 Timer 13 Ripple filter 6 Peak detection 14 ASO 7 GND 15 Output 8 Input 3 VCCH ICs for Audio Common Use AN7077Z ■ Absolute Maximum Ratings Parameter Supply voltage Symbol Rating Unit VCC 34 V ICC 9.0 A PD 68.2 W Topr −25 to +75 °C Tstg −55 to +150 °C *2 Supply current Power dissipation *3 Operating ambient temperature Storage temperature *1 *1 Note) *1 : Ta = 25°C except operating ambient temperature and storage temperature. *2 : Without input signals (output current 0 mA). *3 : The value when Rth(j-c) = 1.1°C/W, Ta = 75°C. ■ Recommended Operating Range Parameter Supply voltage Symbol Range Unit VCC 10.0 to 28.0 V ■ Electrical Characteristics at VCCH = 24.0 V, VCCL = 12 V, frep. = 1 kHz, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Quiescent current ICQ VIN = open 25 50 mA Standby current ISTB VIN = open 1 10 µA Output offset voltage 1 VOFF1 VIN = 8 V, RL = 4 Ω 2.0 2.5 3.0 V Output offset voltage 2 VOFF2 VIN = 16 V, RL = 4 Ω 2.5 3.0 3.5 V Output current IOUT VIN = 14 V, RL = 2 Ω 7.0 8.0 A Voltage gain GV VIN = 3 Vrms (DC 15 V), RL = 4 Ω −1.0 0.0 1.0 dB Pin 4 output current IDET IOUT = 2 A 150 190 230 µA Pin 5 output current 1 ITI1 Pin 4 = high, pin 5 = 3 V 13 15 17 µA Pin 5 output current 2 ITI2 Pin 4 = low, pin 5 = 3 V 4.5 5 5.5 µA LED output current ILED VIN = 1 Vrms (DC 16 V), VLED = 8 V 15 30 mA VIN = open, VSTB = 5 V 500 650 800 µA Standby terminal current ICQ-STB 3 AN7077Z ICs for Audio Common Use ■ Usage Notes 1. Always attach an outside heat sink to use the chip. In addition, the outside heat sink must be fastened onto a chassis for use. 2. Connect the radiation fin to GND potential. 3. Avoid short circuit to VCC and short circuit to GND, and load short-circuit 4. The thermal protection circuit will be actuated at TJ = approx. 145°C, but it is automatically reset when the chip temperature drops below the above set level. 5. The overvoltage protection circuit starts its operation at VCC = approx. 36 V. 6. The protection circuit between V CC and the output starts its operation when the V CC − output voltage = approx. 18 V. 7. For the standby voltage, use a stabilized power supply of 3 V or more. ■ Technical Information • PD TA curves of HZIP015-P-0745A PD T A 120 Rth(j-c) = 1.1°C/W Rth(j-a) = 68.3°C/W Infinite heat sink 113.6 Allowable power dissipation PD (W) 100 80 60 59.5 1°C/W heat sink 40.3 2°C/W heat sink 40 30.5 3°C/W heat sink 20.5 5°C/W heat sink 20 10°C/W heat sink 11.3 1.8 Without heat sink 0 0 25 50 75 100 Ambient temperature Ta (°C) 4 125 150 5 V ± 0.5 V Mute VTH = 2.8 V VIN2 10 µF 4.7 kΩ 10 kΩ 10 kΩ Off 100 s On 0.3 V 5.5 V 35 s 4 13 4 AN7194Z 2 15 2.2 Ω 0.33 µF 11 3 2.2 µF 9 0.1 µF AN7077Z 1 000 µF 100 kΩ 15 4.7 kΩ 8 20 kΩ 5 1 000 µF 6 2.2 Ω 100 µF 7 10 12 2.2 Ω 9 8 STB 100 µF 1 500 pF 14 1 0.22 µF 0.22 µF 14 10 7 11 6 5 12 VIN1 56 kΩ 10 µF 3 Off Mute On Active high 5 V ± 0.5 V STB VTH = 3.5 V 2.2 Ω 0.22 µF 0.22 µF 2.2 Ω 0.1 µF ICs for Audio Common Use AN7077Z ■ Application Circuit Example VCCH 24 V AC VCCL 12 V 1 13 5